Prior End Balance Forward Invalid G/L date failure

E1 - Enter change order - update of Request Date not possible - G/L Date failure

I can´t update/change the Request Date in the PO Detail; “Enter Change Order” Application P4310, Version FW40106, Form W4310A, Help Identifier 431001.

E1 gives red error for G/L DATE! The request date and G/L date are 4/25/2015 (prior fiscal year) but the current date is 01/31/2015.

The error is Error 4427: Prior End Balance Forward Invalid

I am trying to change the Request date but it seems that JDE is validating the G/L date

Does this mean that any changes to a PO in the Prior Fiscal year are not allowed unless the G/L date is changed to the current period?